US3779823A
Expired / Lapsed
US
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Abrasion resistant gas generating compositions for use in inflating safety crash bags
Assignee: Individual
•
Filing: 1971-11-18
•
Granted: 1973-12-18
•
Expires: 1991-11-18
Abstract
Abstract An abrasion resistant granular gas generating composition comprising a metallic azide, oxidizers for the azide, and a small amount of a novel cured polymeric binder having a relatively high oxygen content and prepared entirely from solid binder ingredients having a melting point in the range of 45* C to 130* C. The compositions are resistant to abrasion during long storage periods and when ignited produce predominately non-toxic gases.
Inventors
- 👤 R Price
- 👤 R Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:09
CPC Classifications
C; C06; C06B; C06B35/00; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
27 words
The composition as in claim 1 wherein the metallic azides are alkali metal azides selected from the group consisting of sodium azide, lithium azide, and potassium azide.
Claim 2
Dependent Claim
12 words
The composition as in claim 1 wherein the azide is sodium azide.
Claim 3
Dependent Claim
30 words
The composition as in claim 1 wherein the metallic sulfides are selected from the group consisting of molybdenum disulfide, antimony trisulfide, bismuth sulfide, ferrous sulfide, stannous sulfide, and tungsten disulfide.
Claim 4
Dependent Claim
13 words
The composition as in claim 4 wherein the metallic sulfide is molybdenum disulfide.
Claim 5
Dependent Claim
20 words
The composition as in claim 1 wherein the oxidizers for the azide are a mixture of molybdenum disulfide and sulfur.
Claim 6
Dependent Claim
38 words
The composition as in claim 1 wherein the cured binder is the reaction product of a solid organic diisocyanate, a solid polyethylene glycol having a molecular weight of 2,000 to 6,000, and a solid multifunctional hydroxyl curing agent.
Claim 7
Dependent Claim
26 words
The composition as in claim 7 wherein the components of the binder are solids with melting points in the range of 45* C to 130* C.
Claim 8
Dependent Claim
14 words
The composition as in claim 7 wherein the solid organic diisocyanate is bitolylene diisocyanate.
Claim 9
Dependent Claim
20 words
The composition as in claim 7 wherein the solid polyethylene glycol is polyethylene glycol of the molecular weight of 4,000.
Claim 10
Dependent Claim
42 words
The composition as in claim 7 wherein the solid polyethylene glycol is a multifunctional hydroxyl-terminated copolymer of propylene oxide and ethylene oxide containing at least 70 percent ethylene oxide with a melting point in the range of 45* C to 130* C.
Claim 11
Dependent Claim
16 words
The composition as in claim 7 wherein the solid multifunctional hydroxyl curing agent is trimethylol propane.
Claim 12
Dependent Claim
71 words
An abrasion resistant granular gas generating composition for inflating safety crash bags consisting essentially of from 50 to 70 percent by weight of metallic azide, 25 percent to 50 percent by weight of at least one oxidizer for the azide selected from the group consisting of metallic sulfides, metallic oxides, and sulfur, and 3 percent to 5 percent by weight of cured polyether based polyurethane binder having a high oxygen content.
Claim 13
Dependent Claim
27 words
The composition as in claim 13 wherein the metallic azides are alkali metal azides selected from the group consisting of sodium azide, lithium azide, and potassium azide.
Claim 14
Dependent Claim
12 words
The composition as in claim 13 wherein the azide is sodium azide.
Claim 15
Dependent Claim
30 words
The composition as in claim 13 wherein the metallic sulfides are selected from the group consisting of molybdenum disulfide, antimony trisulfide, bismuth sulfide, ferrous sulfide, stannous sulfide, and tungsten disulfide.
Claim 16
Dependent Claim
13 words
The composition as in claim 16 wherein the metallic sulfide is molybdenum disulfide.
Claim 17
Dependent Claim
20 words
The composition as in claim 13 wherein the oxidizers for the azide are a mixture of molybdenum disulfide and sulfer.
Claim 18
Dependent Claim
38 words
The composition as in claim 13 wherein the cured binder is the reaction product of a solid organic diisocyanate, a solid polyethylene glycol having a molecular weight of 2,000 to 6,000, and a solid multifunctional hydroxyl curing agent.
Claim 19
Dependent Claim
26 words
The composition as in claim 19 wherein the components of the binder are solids with melting points in the range of 45* C to 130* C.
Claim 20
Dependent Claim
14 words
The composition as in claim 19 wherein the solid organic diisocyanante is bitolylene diisocyanate.
Claim 21
Dependent Claim
20 words
The composition as in claim 19 wherein the solid polyethylene glycol is polyethylene glycol of the molecular weight of 4,000.
Claim 22
Dependent Claim
42 words
The composition as in claim 19 wherein the solid polyethylene glycol is a multifunctional hydroxyl-terminated copolymer of propylene oxide and ethylene oxide containing at least 70 percent ethylene oxide with a melting point in the range of 45* C to 130* C.
Claim 23
Dependent Claim
16 words
The composition as in claim 19 wherein the solid multifunctional hydroxyl curing agent is trimethylol propane.
Claim 24
Dependent Claim
24 words
The composition as in claim 1 wherein the metallic oxide is selected from the group consisting of molybdenum trioxide, tungsten trioxide, and vanadium pentoxide.
Claim 25
Independent Claim
208 words
A method of making an abrasion resistant granular gas generating composition utilizing all solid ingredients, said composition consisting essentially of a metallic azide; at least one oxidizer for the azide selected from the group consisting of metallic sulfides, metallic oxides, and sulfur; and a cured polymeric binder based upon curable polymer forming solid binder components having melting points in the range of 45* C to 130* C. said method comprising the steps of: a. grinding separately the individual polymer forming binder components; b. blending the ground polymer forming binder components to produce an intimate mixture of binder component solids; c. blending the intimate mixture of binder component solids with the metallic azide and at least one oxidizer for the azide to form a composite blend of solids having an average particle diameter of about 12 microns; d. fluid energy milling the composite blend produced in step (c) to reduce the average particle diameter of the composite blend to about 1 to 3 microns; e. pressing the product from step (d) to form pellets of gas generating composition; f. heating the pellets for form and cure the polymeric binder in situ; g. grinding the pellets to produce granules of abrasion resistant gas generating composition; and h. collecting the granules.
Claim 26
Dependent Claim
20 words
The method as in claim 26 wherein the pellets in step (f) are heated for 20 minutes at 220* F.
Claim 27
Dependent Claim
41 words
The method as in claim 26 wherein the metallic azide, the oxidizer for the azide, and the curable polymer forming binder components are blended together and ground in a single step prior to the fluid energy milling step of step (d).
Claim 28
Dependent Claim
11 words
The method of claim 26 wherein the azide is sodium azide.
Claim 29
Dependent Claim
13 words
The method of claim 26 wherein the oxidizers are molybdenum disulfide and sulfur.
Claim 30
Dependent Claim
40 words
The method of claim 26 wherein the curable polymer-forming solid ingredients consist of a solid polyethylene glycol, a solid organic diisocyanante, and a solid curing agent, all components having melting points in the range of 45* C to 130* C.
Claim 31
Dependent Claim
28 words
The method as in claim 26 wherein the curable polymer-forming solid ingredients consist of polyethylene glycol of the molecular weight of 4,000, bitolylene diisocyanante, trimethylolpropane, and ferric acetylacetonate.
Claim 32
Dependent Claim
63 words
The method as in claim 26 wherein the abrasion resistant granular gas generating composition is prepared consisting of an intimate mixture of 50 percent to 70 percent by weight of sodium azide, 25 percent to 50 percent by weight of molybdenum disulfide, 0.5 pErcent to 5.0 percent by weight of sulfur, and 1 percent to 10 percent by weight of curable polymeric binder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |